Grinding-disk.



- Wa' Znes'sas C. H. RICH S.

. GRINDING D APPLIGATIGN FILED MAY 18, X907. 927,077. Patented July6,1909

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NITED STATES OFFICE.

CHARLES II. RICHARDS, OF CHICAGO, ILLINOIS, ASSICNOR TO LOUIS ARMSTRONG,OF CIIICAGO, ILLINOIS.

GRINDING-DISK.

Specification of Letters Patent.

Patented July 6, 1909.

Application filed May 18, 1907. Serial No. 374,360.

To all whom it may concer/a:

Be it known that I, CHARLES II. RIGH- Anns, a citizen of the UnitedStates, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Grinding-Disks, and I do hereby declarethat the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to improvements in millstone-dresses and moreespecially to the construction in the working faces of a pair of platesor disks adapted for treating particles of cooked or partially cookedcorn or other cereal to lirst flatten and thereafter roll the particlesinto individual linished form.

My invention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

In the drawings :--Figures l and 2 are plan views of the working facesof the two grinding plates or bur wheels. Figs. 3 and 4 are enlargeddetail plan views of portions of the two plates shown in Figs. l and 2,respectively. Fig. 5 is a section taken on lines 5--5 of Figs. l and 2showing the two plates arranged in operative relation to each other.Fig. 6 is a section taken on the lines 6-6 of Figs. 3 and 4 showing thetwo plates arranged. in operative relation to each other. Fig. 7 is asection on the line 77 of Fig. 4. Fig. S is a section on the line 8-8 ofFig. 3.

As shown in said drawings, A and A1 indicate the grinding plates ordisks which are of the well-known annular form and` will usually bearranged in vertical planes, with their working faces toward each otherand separated about a thirty-second of an inch. Either or both of saiddisks may be turned or driven in such manner as to afford rela tiverotative movement between them. Preferably the grinding disks arerotated in opposite directions in order that the relative movementbetween their faces may be large without the necessity of rotatingeither plate at a greater' speed than is convenient. The working facesof the disks are of like construction with the exception of a slightdifference in the arrangement of the furrows in their working faces, aswill hereinafter be explained. Each of said disks has the usual eye aand is provided on its inner' face with. a central concave part or:recess A2 concentric with the eye, into which is fed the material to beacted upon, and outside ofsaid recess with an annular marginal grindingsurface which is generally flat, and parallel with the correspondingsurface of the other disk, and on which are formed feeding and grindingchannels or furrows and intervening lands or ridges. The said recessesA2 are made of considerable depth and occupy a substan tial part of thecentral part of the disk.

Each of the disks is provided on its marginal working ortion withalternate broad lands B and relatively narrower grooves or furrows C C1.The said furrows are arranged to extend from the inner' to the outermargin. of the annular working surface, and are inclined with respect toradial lines of the disks. The outer parts of the furrows are inclinedwith respect to the main parts thereof and are disposed at smallerangles with the radial lines of the disks, the purpose of such change indirection of the fur rows being to lessen at the outer parts of thedisks the rate of outward. feed or travel of the material being actedupon. rllhe faces of the lands B B are flat and in planes pernpendicular to the axis of rotation of the disks. The lands and furrowsoccupy that annular portion of the disk which, in grinding disks, haveheretofore been known as the skirt of the disk.

Each of the furrows C Cl is formed with a shoulder c at one sidethereof, said shoulder' being perpendicular to the flat faces of thelands B B, and an inclined bottom surface c1 which extends from theplane of the land and meets the bottom or inner edge of the saidshoulder c. The two disks are rotated, as shown by the arrows on Figs. 3and 4, in a direction to carry the shoulders c of the furrows C inadvance of the inclined sur faces c1 thereof.

The two disks A Al are also provided with a series of auxiliary recessesor furrows, located adjacent to and extending outwardly from the centralrecesses of said disks and of which those in the disk A are indicated by`:D D and those in the disk A1 are indicated by D1 D1. One of the saidfurrows I) or D1 is located at the inner end. of each of the mainfurrows C C1. The auxiliary furrows extend diagonally across the innerends of the main furrows. Said furrows or recesses D Dl are, moreover,provided with bottom surfaces which are inclined in the same directionas the bottom surfaces of the main furrows C Cl, but which are at agreater inclination to the flat surfaces of the lands than the saidfurrows C C1; said furrows D D1, because of the greater inclination oftheir bottom surfaces, being of greater depth at their deepest partsthan said main furrows C C1.

Between the central recesses of the disks A A1 and the outer annularworking faces thereof, are formed abrupt annular surfaces or shoulders EEl, as shown in Figs. 6, 7 and S, and the said auxiliary furrows D D1open into the said central recesses between said shoulders E El. Saidauxiliary furrows D Dl form openings or spaces through which thematerial to be treated or acted upon by the disks passes from saidcentral recesses to and between the working faces of said disks. Thefurrows D Dl in the two disks are generally alike, but as preferablyconstructed, differ somewhat from each other in the two disks, as willappear from the following:

Each of the furrows D is made by cutting perpendicularly into the faceof the disk A along a line d, which is tangent to a circle of slightlyless radius than the inner circumference or shoulder E at the inner edgeof the working face of the disk, and by forming an oblique flat face d1extending from a line d2 which coincides with the shallower edge of thefurrow C, until it meets the lower edge of the shoulder formed along theline d. Said shoulder, indicated by the line d, extends across the innerend of the furrow C and terminates at the annular surface or shoulder Eand is, by reason of the inclination of the bottom face of the groove,of tapered form; being deepest at the line of its intersection. with thesurface E and extending to a point at its outer end, where it meets theline d2.

Each furrow D1 in the disk A1 is made by cutting pcrpendicularly intothe face of said disk along a line d3 tangent to the inner circumferenceor shoulder E1 at the inner man gin of the working face of the disk andextending at an angle across the inner end of the furrow C1 into theface of the adjacent land B, and by forming an oblique surface d4constituting the bottom of said furrow, which surface extends from aline di parallel with the abrupt shoulder of the next adjacent furrow Cland extending to the lower edge or margin of said shoulder d3. Saidshoulder di is of tapered form and of greatest depth where it meets theannular shoulder El. Dy this construction of the furrow D1 a narrow landportion d forming an extension of the land B on the disk A1, is formedbetween the trailing edge of said furrow and the leading edge of saidfurrow Cl.

By inspection of Fig. 6 it will be seen that the construction describedin the inner or auxiliary furrows D D1, provides along the annularshoulders E E1 at the inner margins of the working faces of the disks, aseries of spaces of considerable width into which the particles of thematerial being operated upon may enter in the passage of said particlesfrom the central recesses into the space between the working faces ofthe disks. lt will be furthermore noted that the flat lands arerelatively wider than the furrows and that they extend from pointsclosely adjacent to the central recesses A2 to the margins of the disksand are of increasing width from their inner to their outer ends.

The operation of the grinding disks is as follows: The material operatedupon will usually be cracked and cooked corn or hominy and the same willbe fed in a moist condition into the central recess between the twodisks. The operation will be the same, however, when the materialconsists of other cereals, cooked or uncooked. The material is fedthrough the eyes a to the central space between the disks formed beneaththe bottoms of the recesses A2 and is thrown outwardly by centrifugalforce and the articles thereof first enter the spaces forme by andbetween the inner or auxiliary furrows D D1 which, in the deeperportions thereof, afford spaces wide enough to receive the largest ofsaid particles. As the particles of material pass outwardly along theinclined bottom surfaces ef said auxiliary furrows D D1, they are caughtbetween the inclined bottom surfaces of the opposed furrows and arecarried between the adjacent surfaces of the lands between saidauxiliary furrows, whereby each particle is squeezed or compressed toform a flat flake. The flat flakes thus formed, in their outward radialmovement, are carried into the main furrows C C1 and being caughtbetween the inclined bottom surfaces of opposed furrows and between theopposed lands are squeezed, kneaded and rolled in such manner that theybecome spongy or porous in texture and assume the form of small,elongated flaky cylinders. These cylinders are carried outwardly be*tween the adjacent land surfaces until all moisture has been excluded ordriven oil", and the material is discharged at the outer margins of thedisks in a dry state. The change in the direction of the main furrows CC1 has the effect of retarding the outward progress of the particles ofmaterial so that they will remain a sufficiently long time un.- der theaction of the lands to insure the drying thereof before they aredischarged from between the disks.

The particles of cereal being treated, after f gradually to the planesof the lands.

being flattened, may cross' one or more furroWs and lands in theiroutward passage to the margins of the disks, during Which time. they arebeing rolled and dried. inasmuch, however, as the abrupt shoulders c ofthe furroWs are carried, in the rotation. of the disks, in advance ofthe inclined surfaces cl thereof, the crossing of said furrovvs by saidrolled particles has no tendency to break up or disintegrate the latter,because While occupying said furrows they are acted upon only by theopposing inclined surfaces or bottoms of said furrovvs Which carry saidrolled particles under moderate pressure Moreover, the Widening of thelands at their outer ends has the effect to subject the particles to amaximum rolling action, by Whicli the rolled particles are dried.

l claim as my invention 1.. A disk for the purpose set forth providedwith a central eye and one side thereof with a Wide recess surroundingthe eye and outside of said recess with an annular or skirt portion,alternate lands and main furroWs externling across said annular or skirtportion from points adjacent to said central recess to the periphery ofthe disk, said lands being made wide and increasing in width towardtheir outer ends, and auxiliary furroWs extending diagonally across theinner ends of the main furrows and opening into the said central recess,the leading edges of the main and auxiliary furroWs being formed withabrupt shoulders and the bottoms of said 4furrows being inclined towardtheir trailing1 edges Where they meet the leading edges ofthe lands.

2. A disk for the purpose set forth provided with a central eye and oneside thereof with a Wide recess surrounding the eye and outside of saidrecess with an annular or skirt portion, 'alternate lands and mainfurrows extending across said annular or skirt portion from pointsadjacent to said central recess to the periphery of the disk, said landsbeing` made Wide and increasing in Width toward their outer ends, theleading edges of said main furroivs being formed With abrupt shouldersand the bottoms of said furrows being inclined toward their' trailingedges where they meot the leading edges of the lands, and auxiliaryfurrows extending diagonally across the inner ends of said main furrows,the leading edges of said auxiliary furrows being also shouldered andextending a distance diagonally across the inner ends of the trailingedges of said lands, the bottoms of said auxiliary furrows beinglikewise inclined toward their trailing edges Where they meet theleading edges of the lands and said auxiliary furrows being openthroughout their Width to said recess.

3. A disk for the purpose set forth provided with a central eye and oneside thereof with a Wide recess surrounding the eye and outside of saidrecess with an annular or skirt portion, alternate lands and mainfurroWs extending across said annular or skirt portion from pointsadjacent to said central recess to the periphery of the disk, andauxiliary furrows extending diagonally across the iijner ends of themain furrows and opening into the said central recess, the leading edgesof the main and auxiliary furrows beingformed With abrupt shoulders andthe bottoms of said furrows being inclined tovvard their trailing edgesWhere they meet the leading edges of the lands, said main furroWs beingmade of substantially uniform Width throughout their' length anddeflected at their outer ends to retard the feed of the material and thelands being made of increasing Width toward their outer ends.

a. A pair of disks for the purpose set forth arranged in parallel planeswith theirworking faces adjacent to each other and separated a smalldistance, said disks being provided With central eyes and formed ontheir adjacent or Working faces with central recesses surrounding saideyes and outside said recesses with annular or skirt portions, alternatelands and main furroWs extending across said annular or skirt portionsfrom points adjacent to said central recesses to the peripheries of thedisks, and auxiliary furroWs extending diagonally across the inner endsof the main furroWs, one edge of each of the main and auxiliary furrowsbeing formed with an abrupt shoulder and the bottoms of said furrowsbeing inclined toward their other edges Where they meet` the planes ofthe lands, said disks being designedv to be so relatively rotated thatthe shouldered edge of each of the main and auxiliary furrows of onedisk is carried in advance of the inclined bottom thereof and approachesthe shoulders of the furrovvs of the other disk from the land sides ofsaid shoulders.

5. A pair of disks for the purpose set forth arranged in parallel planeswith their Working faces adjacent to each other and separated a smalldistance, said disks being provided with central eyes and formed ontheir adjacent or working faces with central recesses surrounding saideyes and outside said recesses With annular or skirt portions, alternatelands and main furrowsextending across said annular or skirt portionsfrom points adjacent to said central recesses to the peripheries of thedisks, and auxiliary furrows extending diagonally across the inner endsof the main furrows, one edge of each of the main and auxiliary furrovvsbeing formed with an abrupt shoulder and the bottoms of said fui'rowsbeing inclined toward their other edges where they meet the planes ofthe lands, said disks being designed to be so relatively rotated thatthe shouldered edge of each of the main and auxiliary fur-- rows of onedisk is oaii'ied in advance of the inclined bottom thereof andapproaches the shoulders of the fuii'ows of the other disk from the hindsides of said shouideis, the trailing ends of the auxiliary fuiI'oWs ofone of said disks extending' u substzuitiui distance into the inner endso1 said kinds.

In testimony, that I Claim the foregoing as my invention I :i'Hx mysignature in tho presence of two Witnesses` this Mtb fil-(1y of May l0A. D. 1907.

CHARLES H. RICHARDS /'Vitnesses GEQBGE R. WILKINS, A. Wi BUNNv

